subr_power.c revision 91640
185835Siwasaki/*- 285835Siwasaki * Copyright (c) 2001 Mitsuru IWASAKI 385835Siwasaki * All rights reserved. 485835Siwasaki * 585835Siwasaki * Redistribution and use in source and binary forms, with or without 685835Siwasaki * modification, are permitted provided that the following conditions 785835Siwasaki * are met: 885835Siwasaki * 1. Redistributions of source code must retain the above copyright 985835Siwasaki * notice, this list of conditions and the following disclaimer. 1085835Siwasaki * 2. Redistributions in binary form must reproduce the above copyright 1185835Siwasaki * notice, this list of conditions and the following disclaimer in the 1285835Siwasaki * documentation and/or other materials provided with the distribution. 1385835Siwasaki * 1485835Siwasaki * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1585835Siwasaki * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1685835Siwasaki * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1785835Siwasaki * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1885835Siwasaki * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1985835Siwasaki * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2085835Siwasaki * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2185835Siwasaki * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2285835Siwasaki * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2385835Siwasaki * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2485835Siwasaki * SUCH DAMAGE. 2585835Siwasaki * 2685835Siwasaki * $FreeBSD: head/sys/kern/subr_power.c 91640 2002-03-04 18:46:13Z iwasaki $ 2785835Siwasaki */ 2885835Siwasaki 2985835Siwasaki#include <sys/param.h> 3085835Siwasaki#include <sys/systm.h> 3191640Siwasaki#include <sys/proc.h> 3285835Siwasaki 3385835Siwasaki#include <sys/power.h> 3485835Siwasaki 3585835Siwasakistatic u_int power_pm_type = POWER_PM_TYPE_NONE; 3685835Siwasakistatic power_pm_fn_t power_pm_fn = NULL; 3785835Siwasakistatic void *power_pm_arg = NULL; 3885835Siwasaki 3985835Siwasakiint 4085835Siwasakipower_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg) 4185835Siwasaki{ 4285835Siwasaki int error; 4385835Siwasaki 4485835Siwasaki if (power_pm_type == POWER_PM_TYPE_NONE || 4585835Siwasaki power_pm_type == pm_type) { 4685835Siwasaki power_pm_type = pm_type; 4785835Siwasaki power_pm_fn = pm_fn; 4885835Siwasaki power_pm_arg = pm_arg; 4985835Siwasaki error = 0; 5085835Siwasaki } else { 5185835Siwasaki error = ENXIO; 5285835Siwasaki } 5385835Siwasaki 5485835Siwasaki return (error); 5585835Siwasaki} 5685835Siwasaki 5785835Siwasakiu_int 5885835Siwasakipower_pm_get_type(void) 5985835Siwasaki{ 6085835Siwasaki 6185835Siwasaki return (power_pm_type); 6285835Siwasaki} 6385835Siwasaki 6485835Siwasakivoid 6585835Siwasakipower_pm_suspend(int state) 6685835Siwasaki{ 6785835Siwasaki if (power_pm_fn == NULL) 6885835Siwasaki return; 6985835Siwasaki 7085835Siwasaki if (state != POWER_SLEEP_STATE_STANDBY && 7185835Siwasaki state != POWER_SLEEP_STATE_SUSPEND && 7285835Siwasaki state != POWER_SLEEP_STATE_HIBERNATE) 7385835Siwasaki return; 7485835Siwasaki 7585835Siwasaki power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state); 7685835Siwasaki} 7785835Siwasaki 7891640Siwasaki/* 7991640Siwasaki * Power profile. 8091640Siwasaki */ 8191640Siwasaki 8291640Siwasakistatic int power_profile_state = POWER_PROFILE_PERFORMANCE; 8391640Siwasaki 8491640Siwasakiint 8591640Siwasakipower_profile_get_state(void) 8691640Siwasaki{ 8791640Siwasaki return (power_profile_state); 8891640Siwasaki} 8991640Siwasaki 9091640Siwasakivoid 9191640Siwasakipower_profile_set_state(int state) 9291640Siwasaki{ 9391640Siwasaki int changed; 9491640Siwasaki 9591640Siwasaki if (state != power_profile_state) { 9691640Siwasaki power_profile_state = state; 9791640Siwasaki changed = 1; 9891640Siwasaki printf("system power profile changed to '%s'\n", 9991640Siwasaki (state == POWER_PROFILE_PERFORMANCE) ? "performance" : "economy"); 10091640Siwasaki } else { 10191640Siwasaki changed = 0; 10291640Siwasaki } 10391640Siwasaki 10491640Siwasaki if (changed) 10591640Siwasaki EVENTHANDLER_INVOKE(power_profile_change); 10691640Siwasaki} 10791640Siwasaki 108